});

​

        }

      }

    }

​

​

    private _initFromOpenDatabase(openDatabase, forceLoadFromDom: boolean, pathElements: { [name: string]: HTMLScriptElement; }) {

      var dbName = this.handler.uniqueKey ? this.handler.uniqueKey : getUniqueKey();

​

      var detect = new teapo.storage.attached.webSQL.DetectStorage();

      detect.detectStorageAsync(dbName, (error, load) => {

        if (error) {

          alert('webSQL.DetectStorage.detectStorageAsync ' + error);

          return;

        }

​

        console.log('webSQL: success. ', load);

​

      var db = openDatabase(dbName, 1, null, 1024 * 1024 * 5);

​

      this._executeSql = (

        sqlStatement: string,

        args: any[],

        callback: (transaction: SQLTransaction, result: SQLResultSet) => void,

        errorCallback: (transaction: SQLTransaction, error: SQLError) => void) => {

​

        var errorCallbackSafe = (t: SQLTransaction, e: SQLError) => {

          alert(e + ' ' + e.message + '\n' + sqlStatement + '\n' + args);

          errorCallback(t, e);

        };

​

        db.transaction((t) => t.executeSql(sqlStatement, args, callback, errorCallbackSafe));

      };

      this._insertMetadataSql = 'INSERT INTO "*metadata" (name, value) VALUES(?,?)';

      this._updateMetadataSql = 'UPDATE "*metadata" SET value=? WHERE name=?';

​

      this._metadataProperties = {};

      this._loadTableListFromWebsql((tableList) => {

        var metadataTableExists = false;

        for (var i = 0; i < tableList.length; i++) {

          if (tableList[i] === '*metadata') {

            metadataTableExists = true;

            break;

          }

        }

        if (!metadataTableExists || forceLoadFromDom) {

          this._loadInitialStateFromDom(pathElements);

          return;

        }

​

        var domEdited = this._metadataElement ?

          safeParseInt(this._metadataElement.getAttribute('edited')) :

          null;

​

        loadPropertiesFromWebSql(

          '*metadata',

          this._metadataElement,

          this._metadataProperties,

          this._executeSql,

          sqlError => {

            if (sqlError) {

              this.handler.documentStorageCreated(new Error('loadPropertiesFromWebSql:*metadata: ' + sqlError.message), null);

              return;

            }

​

            var wsEdited = safeParseInt(this._metadataProperties.edited);

            if (!wsEdited || domEdited && domEdited > wsEdited)

              this._loadInitialStateFromDom(pathElements);

            else